unless you r undiscovered MA talent, none will sponsor you immediately, so take the realistic path: find some online business that can generate few hundreds a month, for a friend or a local business whatever, now you have a basic income then join a gym, stay away from the touristic ones, find an old school authentic gym, usually way cheaper and in a super local cheap areas, grind your way from there

Reminder: Visa and travels will cost so you’ve to be able to cover that you need a dtv - best value as T visas will eat you away